Cream margarine and sugar.,Add eggs; beat until light and fluffy.,Add vanilla.,Stir in flour and baking powder.,Mix until smooth.,Butter a 13 x 9-inch pan.,Pour mixture into pan.,Spoon a teaspoon of pie filling onto cake in 16 spots, spacing 4 spoonfuls evenly in each direction.,Bake at 350° for 35 to 50 minutes or until golden and cake tests done (glass pan 325°). Sprinkle with powdered sugar.,______,(Great served warm.)